Cooperative effects of Coulomb and electron-phonon interactions in the two-dimensional 16-band d-p model for iron-based superconductors

Yuki Yanagi, Youichi Yamakawa, Naoko Adachi, Yoshiaki Ono

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We study the electronic states and the superconductivity in the two-dimensional 16-band d-p model coupled with A1g, B1g, and Eg local phonons and obtain the rich phase diagram including the magnetic-, charge-, and orbital-ordered phases on the parameter plane of the Coulomb and electron-phonon interactions. When the electron-phonon interaction is dominant, the charge fluctuations induce the s++ -wave superconductivity, while when the Coulomb interaction is dominant, the magnetic fluctuations induce the s± -wave superconductivity. Remarkably, the orbital fluctuations are enhanced due to the cooperative effects of the Coulomb and electron-phonon interactions and induce the s++ -wave and the nodal s± -wave superconductivities.

Original languageEnglish
Article number064518
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number6
DOIs
Publication statusPublished - 2010 Aug 24
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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